Fastening for eyeglasses.



No. 675,092. Patented May 28, l90l.

A. GRUMME.

7 FASTENING FOR EYEGLASSES.v

(Lpplicqtion 1116a Jan. 20, 1901.)

(No Model.)

iz/llllll/k August Grumme UNTTEE STATES PATENT @EETQE.

AUGUST GRUMME, OF ST. LOUIS, MISSOURI.

FASTENING FOR EYEGLASSES.

SPECIFIGATIQN forming part of Letters Patent No. 675,092, dated May 28, 1901.

Application filed January 26, 1901- Serial No. 44,797. (No morlehl To all whom, it may concern:

Be it known that 1, AUGUST GRUMME, a citizen of the United States, residing at the city of St. Louis, in the State of Missouri, have invented a certain new and useful Fastening forEyeglasses, of which the following is such a full, clear, and exact description as will enable any one skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

I-Ieretofore considerable trouble has been experienced in fastening the bow and guards or nosepieces to the posts of eyeglasses so that they would not come loose. This is owing to the fact that each time the eyeglasses are placed in position or removed the bow must be bent to separate the guards or nosepieces. This is done by grasping the lens and drawing them apart. This brings considerable strain upon the points at which the bow and guards are attached to the posts, and thus causes the screw holding these parts together to become loosened. A number of constructions have been devised to overcome this dif ficulty; but, as far as I am aware, they have either been unsuccessful or have had some disadvantagesuch, for instance, as leaving an unsightly finish on the end of the post.

The object of my invention is to provide a form of fastening which will positively and effectively prevent the screw from coming loose and which at the same time will leave a smooth finish on the end of the post.

My invention consists in the various novel features and details of construction described in the following specification andpointed out in the claims aflixed hereto.

In the accompanying drawings, which illustrate a pair of eyeglasses embodying my invention, Figure 1 is a front view, partly in elevation and partly in section. Fig. 2 is a longitudinal central section through one of the posts. Fig. 3 is a detailed view of the locking-plate; and Figs. 4 and 5 are views similar to Fig. 3, but showing slight modifications.

Like marks of reference refer to similar parts in the several views of the drawings.

represents the lenses of the eyeglasses, which are fastened by means of screws 11 between the bifurcated ends of the posts 12.

Each of the posts 12 is provided with a box. 125 of the usual construction, adapted to receive one end of the bow 1.4 and also the shank of one of the guards or nosepieces 1G.

17 is a screw-threaded rod, which enters a threaded opening 18 in the posts 12 to secure the bow and nosepieces in position. The threaded rod 17 is provided with an angular head 19, which is adapted to enter a corrcsponding angular depression in the locking-plate 21. The locking-plate 21 consists of a central portion of the same size and shape as the end of the box 13 and two wings 22, adapted to be bent down around the sides of the box. The wings 22 are preferably, but not necessarily, somewhat thinner than the central part of the locking-plate 21.

In securing the parts together the end of the how 14 and shank 15 of the guard 16 are placed in position in the box and the screw 17 inserted in the threaded opening 18, with the locking-plate 21 in position around its head. As soon as the rod has been turned to bring the plate 21 against the face of the box the Wings 22 are bent over, as shown in dotted lines in Fig. 2, thus positively and effectively locking the rod against rotation. The head 19 of the rod 17 preferably projects somewhat beyond the plate, as shown in dotted lines in Fig. 2. After the wings 22 have been bent in position around the box this projecting portion of the head may be filed off to leave it flush with the plate 21, thus securing a neat finish. In case it is desired to withdraw the rod 17, as when some of the parts become broken, the wings 22 can be bent outwardly and upwardly and form means for withdrawing the screw from the post.

In the modification shown in Fig. 1 the screw-threaded rod 17 is soldered or brazed firmly to the plate 21. The rod 17 may therefore be provided with a round head 23 in place of an angular head 19, as the soldering or brazing will prevent any rotation of the rod relative to the locking-plate. In the construction shown in Fig. 4 the central part of IOO forms and is inserted in the post from the rear, the opening in the post being smooth in place of threaded, as in the other constructions. An angular nut 24. is placed in the corresponding depression in the locking-plate 21. and the two parts screwed onto-the rod at the same time, after which the wings 22 are bent in position, as in the former constructions, when the nut 24L may be filed o'lf flush with the face of the plate 21 to give a smooth finish.

While I have illustrated and described my invention as applied to a pair of eyeglasses, it is obvious that it may be applied to other uses, and I do not wish to limit myself to its use in connection with eyeglasses except where the parts of the eyeglasses are specifically claimed in combination with it.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

1. In a pair of eyeglasses, the combination with a post provided with a box, of a bow in said box, a screw-threaded member adapted to hold said parts together, a locking-plate secured to the top of said box by said screwthreaded member and held in non-rotatable relation to said screw-threaded member, and apair of wings carried by said locking-plate and adapted to be bent down against the sides of said box to prevent the rotation of said screw-threaded member.

2. In a pair of eyeglasses, the combination with a post provided with a box, of a bow in said box, a screw-threaded rod provided with a head for holding said parts together, a locking-plate, an opening in said locking-plate for said rod, a recess surrounding said opening for receiving the head of said rod, means for preventing rotation between the said rod and locking-plate, and a pair of wings carried by said locking-plate and adapted to be bent down against the side of said box to prevent the rotation of said rod.

In a pair of eyeglasses, the combination with a post provided with a box, of a bow and the shank of a guard arranged in said box, a screwthreaded member adapted to secure said parts together, and a locking-plate held in position by said screw-threaded member and consisting of a body portion corresponding to the end of said box and held in non-rotatable relation to said screw-threaded member, and a pair of wings of less thickness than said body portion and adapted to be bent around the sides of said box.

4. In a pair of eyeglasses, the combination with a post provided with a box, of a bow and the shank of a guard arranged in said box,a screw-threaded rod adapted to hold said parts together and provided with an angular head, and a locking-plate held in position by said rod and consisting of a body portion corresponding to the end of said box and provided with a recess to receive said angular head, and a pair of wings of less thickness than said body portion and adapted to be bent around the sides of said box.

In testimony whereof I have hereunto set my hand and affixed my seal in the presence of the two subscribing witnesses.

AUG. GRUMME. 1 s] Witnesses:

JAMES H. BRYSON, W. A. ALEXANDER. 

